.BuildSysPro.Building.Zones.HeatTransfer.ZoneNWalls

Information

Model of zone with N walls and NF windows, in pure thermal modelling

Hypothesis and equations

Model of a thermal zone with N vertical walls, NF windows, 1 floor and a ceiling. The walls are of type Wall and windows are of type Window. This model also has an air renewal.

Vertical walls and the ceiling are connected on their outer face to the heat port T_ext and on their inner face to the heat port T_int. Windows are connected in the same way to external and internal boundary conditions. The floor is connected to the port T_ground on its outer face and to the port T_int on its inner face. The air renewal is connected to the indoor air node and to the outdoor thermal port. All these boundary conditions are of convective type and are thus connected to the convection temperature and not the surface temperature, except for the port T_ground.

The distribution of SW fluxes transmitted inside through the windows is done in proportion to the surfaces. The sunshine is still considered, contrary to the Wall model.

The initialisation is done in stationary condition to the temperature Tp.

Bibliography

none

Instructions for use

This single zone building model is to be connected to a weather boundary conditions model on the left (outside temperature, sunlight-related data). The right thermal port is connected to the inner volume (heat capacity) and can, if desired, be connected to any model using a thermal port.

The floor and ceiling parameterization is done via the parameter caracParoi (caracPlaf, caracPlanch), however it still can be done by a wall parametrization layer by layer without creating any type of wall.

1. Click on the small arrow of caracParoi + Edit
2. Fill in the fields on the number of layers, their thickness, the mesh. The parameter positionIsolant is optional
3. For the mat parameter, click on the small arrow + Edit array, match the number of boxes in a column to the number of materials layer in the window that is displayed, then, in each box, right-click + Insert function call and browse the library to specify the path of the desired material (in Utilities.Data.Solids)

The vertical walls parameterization is done via the caracParoiVert parameter (dimension N) of the tab Vertical walls.

1. Click on the small arrow of caracParoiVert + Edit Array
2. Adjust the number of cells (lines) to the number of vertical walls N
3. In each box right-click + Insert function call then browse the library to specify the path of the desired type of wall (in Utilities.Data.WallData)

Note that walls can always be set layer by layer without creating any type of wall. For that:

1. Click on the small arrow of caracParoiVert + Edit Combined
2. Adjust the number of lines to the number of vertical walls N
3. Fill in the fields on thickness, meshes and the number of layers in each wall, then for each material right-click + Insert function call then browse the library to specify the path of the desired type of material (in Utilities.Data.Solids)

Warning, it is imperative that the walls order is the same in the definition of the different fields, orientation, materials, surface, thicknesses ... For example, see TestZoneNWalls validation.

By default, the zone has a south window and four vertical walls oriented in the four cardinal points.

Known limits / Use precautions

The solar flux distribution inside the frame is made in proportion to the surfaces. It is relatively simplistic. To consider walls radiation in long wavelength (LWR), exchange coefficients h must be global exchange coefficients.

Validations

Validation in free evolution by comparison to the assembly model - Gilles Plessis 10/2011

Validation in TestZoneNWalls

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Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2023
BuildSysPro version 3.6.0
Author : Gilles PLESSIS, EDF (2011)
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Revisions

Gilles Plessis 03/2011 : Ajout d'une liste déroulante pour le choix des matériaux via l'annotation annotation(choicesAllMatching=true).

Gilles Plessis 02/2012 : Modification du modèle de renouvellement d'air.

Gilles Plessis 06/2012 :

• Intégration du changement de paramétrage des parois. Voir les révisions apportées au modèle de parois
• Protection de composants pour éviter le grand nombre de variables dans la fenêtre des résultats.